Apparatus for disposal of waste



June 29, 1954 V RQSKE 2,682,166

APPARATUS FOR DISPOSAL OF WASTE Original Filed Sept. 8, 1949 2 Sheets-Sheet l Fl 190 5 i 74 4 1 5 H 13 51:12-1: Tiii'fiLL 178 io i 74 E i I- 5 1 II [8Q 184 ,1 Z80 y 6 .75Z\ 2' 17 v I ||J 174 0 36 40 j T""""'"'T'jf' fi 42- lhvenfar June 29, 1954 ROSKE APPARATUS FOR DISPOSAL OF WASTE 2 Sheets-Sheet 2 Original Filed Sept. 8, 1949 fnvenzor M'zitqn H Pas/(e Patented June 29, 1954 APPARATUS FOR DISPOSAL OF WASTE Milton H. Roske, Malden, Mass asslgnor to United 'Sh'oe Machinery Corporation, Flemington, N. 1., a corporation of New Jersey Original application September 8,1949, Serial No.

114,635, now Patent No. 2,651,933, dated September '15, 1953. Divided and this application August 19, 1952, Serial No. 305,217

4 Claims. i

This invention relates to skiving machines, and is illustrated herein as embodied in a skiving machine of the type disclosed in United States Letters Patent .No. $651,933 which was granted September 15, 1953, upon my application, of

which the present application is a division.

The skiving machine disclosed in the abovementioned patent is adapted for forming a narrow shoulder scarf upon the edge of a workpiece by presenting the work, with an abrupt :bend

deposited therein upon being completely severed from the work. If such chips were allowed to accumulate, it is evident that the skiving action of the knife would soon be impaired, and that the operation of the machine would have to be interrupted frequently to permit the knife to be freed of chips.

In view of the foregoing, it is an object of this invention to provide for the disposal of the skiving chips from a tubular type of knife referred to above. To "this end, and in accordance withone feature of the invention, the illustrated chip disposal means comprises, in combination with a rotary tubular knife having an axial through openingout of which it is desired that the chips be expelled, a fixed waste receiving member mounted within the through opening of the knife and extending into proximity to its cutting edge, and means for directing an air blast into the member to expel the chips therefrom. Accordingly, if the skiving chips upon entering the knife are prevented by the member from engaging the interior of the knife, they are not subject to becoming twisted together by the turning of the knife or being held in it centrifugally.

In order to facilitate the entry of the skiving chips into the waste receiving member, its end adjacent to the cutting edge of the knife is arranged to slope upwardly away from the cutting edge where it is engaged by the work, and is flared into close fitting relation with respect to the inner surface of the knife, so as to eliminate any shoulder against which the chips might be lodged in passing into the member.

These and other features of the invention will now be described in greater detail, and will be defined in the appended claims.

In the drawings,

Fig. 1 is a side elevation of an illustrative machine embodying the invention, the machine being viewed from the left;

Fig. 2 is a front elevation illustrating, at an enlarged scale, the operating vinstrumentalities of the machine and the relation of the workpiece to them during "a skiving operation; and

Fig. 3 is a sectional elevation of the knife and its mounting, the section being taken vertically through the axis of the knife.

There will first be described such structure of the machine disclosed in my prior application as will be necessary for an understanding of the present invention, these parts being denoted by the same reference characters in both specifications.

The illustrative machine comprises a rotary feed roll it comprising a hub I2 at one end, and a narrow rim M at the other end, the rim and hub being connected by an intermediate flared portion I16. A workpiece W to be skived is positioned with its edge flush with the outer end of the rim M by an edge gage 48, upon which is pivotally mounted a vpresser foot 22 which holds the work against the feed roll to form an abrupt bend .in the work, close to its edge, over the junction of the rim M and the flared portion l5.

Immediately behind the presser foot 22 is the cutting edge of a tubular knife 24 which is sharpened with an outside bevel (Fig. 3). A feed disk -=26 holds the work W, adjacent to the presser foot, against the hub l2 of the feed roll, and cooperates with the latter to advance the work toward the knife.

The knife 24 is threaded into a sleeve 32 (Figs. 1 and 8)., and is positioned in coaxial relation therewith by the engagement of a tapered shoulder 34 on the knife with ;a complemental socket formed in the sleeve. The sleeve is mounted to rotate freely upon ball bearings 36 which are carried :by a housing .38, the latter being fixed in position and being rigidly "attached to a standard '40 which extends upwardly from the base 62 of the machine. The knife is driven by a belt M which runs over a pulley 46, the latter being mounted upon the sleeve 32 and arranged to hold the inner races of the ball bearings 36 in assembled relation upon the sleeve.

The feed disk 26 is fixed to the lower end of a stem 12 which is mounted to rotate and slide axially within bearings 14 formed in a bracket 16. The bracket is mounted for adjustment upon the frame so that the feed disk may be positioned properly with respect to the feed roll Hi.

When the workpiece W is presented to the knife it makes a skiving cut by which most of the material is removed from a narrow margin of the work at theupper flesh side, leaving a very thin feather which projects from an abrupt shoulder on the work, and about which the feather is adapted to be folded as described in my above-mentioned patent. The skiving chip is formed inside the 1 knife, and is deposited therein at the end of the skiving cut when the chip is finally severed from the work.

There will now be described the structure, to which the present invention relates, for disposing of the skiving chips. Supported inside the knife and independently thereof is a waste tube I" which extends through the rear end of the sleeve 32 into the knife and terminates adjacent to the cutting edge of the knife. This tube is somewhat smaller than the opening in the knife but is flared at I15 near its forward end so as to fit closelywithin the knife. In order to facilitate further the movement of chips into the waste tube, its end slopes upwardly away from the cutting edge of the knife, and is also beveled on the inside. Furthermore, the axis of the waste tube is offset slightly from that of the knife so that the abovementioned flaring of the waste tube occurs, for the most part, above its axis where it is not likely to be engaged by the skiving chips.

The chips are expelled from the waste tube by a blast of air directed into it through a tube or nozzle I76 which is carried by a cover I18 which forms a closure for that portion of the opening of the knife not already covered by the presser foot 22 and edge gage I8.

In order to provide access to the knife, the cover is mounted to swing away from the edge of the knife upon the lower part of the bearing 14, and may be clamped in either an inoperative position or its operative position by a clamp screw I89. An angular bracket I82 (Fig. 2) is arranged to hold the cover against the bearing I4 and is secured to the rear side of the frame I6 by screws I84 (Fig.1).

The waste tube I'M is carried by a bracket I86, the latter being fixed on a rod I88 which is mounted for axial adjustment in a slide I90 so that the end of the tube I" can be positioned in the desired relation to the knife-edge. A hose or pipe I92 (Fig. 3) is connected to the bracket I86 and is adapted to carry chips, which are blown out of the waste tube I14, into a suitable waste container.

The use and operation of the machine will now be briefly summarized. A workpiece to be skived is presented to the machine by being placed on the feed roll IE] with its leading end underneath the feed disk 26 and presser foot 22 and with its edge to be skived abutting the gage I8. Immediately upon leaving the presser foot, the work is presented to the knife in the abruptly bent condition described above, and the knife forms a very narrow shoulder scarf on a narrow margin of the work at the flesh side.- The thin and usually curling skiving chip projects, through the opening inside the knife, and thence into the tube I14, so that the rotation of the knife is ineffectual to cause the chips to be matted or held within the knife by the effect of centrifugal force. It also'will be evident from Fig. 3.that the sloping and flared form of the end of the tube I14 adjacent to the knife edge will avoid any interference to the passage of chips into the tube. Once the chips are freed from the work the constant blast of air emitted from the nozzle I16 expels the chips through and out of the rear end of the tube I14, and into the pipe I92 which delivers them into a waste container.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a skiving machine, in combination, a

rotary tubular knife having an axial throughopening therein and a cutting edge formed upon one end thereof, a waste tube fixedly mounted within said through-opening and extending into proximity to said knife edge from the other end of said knife, and means for directing an airblast into said knife and tube whereby skiving chips are expelled from said tube away from the knife edge.

2. In a skiving machine, in combination, a rotary tubular knife having a cutting edge formed upon one end thereof, a waste tube extending axially through said knife into proximity to its cutting edge, a closure opposite to the knife edge, and means carried by said closure for directing an air-blast into said knife and tube whereby skiving chips are expelled therefrom.

3. In a skiving machine, in combination, a rotary tubular knife having an axial throughopening therein and a cutting edge formed upon one end thereof, and a fixed waste receiving member disposed within said through-opening and terminating in a flared end closely fitting within said through-opening adjacent to said cutting edge.

4. In a skiving machine, in combination, a rotary tubular knife having an axial throughopening therein and .a cutting edge formed upon one end thereof, a fixed waste receiving member disposed within said through-opening and terminating in a flared end which slopes upwardly away from said cutting edge and closely fits within said through-opening adjacent to said cutting edge, and means for expelling skiving chips from the opposite end of said member.

References Cited in the file of this atent UNITED STATES PATENTS Number Name Date 1,226,872 Eppler May 22, 1917 1,974,487 Eppler Sept. 25, 1934 2,199,506 McIntire May 7, 1940 

